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(11)

EP 3 111 036 A1

(12)

(43) Date of publication: 04.01.2017 Bulletin 2017/01 (21) Application number: 15706834.7 (22) Date of filing: 27.02.2015

(51) International Patent Classification (IPC):  E21B 41/00(2006.01) E21B 43/243(2006.01) E21B 43/24(2006.01) (86) International application number: PCT/EP2015/054215 (87) International publication number: WO 2015/128497 (03.09.2015 Gazette 2015/35)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME (30) Priority: 27.02.2014 GB 201403455 (71) Applicant: Statoil Petroleum AS 4035 Stavanger (NO)	(72) Inventors: WESENBERG, Margrete, Hånes N-7054 Ranheim (NO) HØGSTØL, Håkon N-7059 Jakobsli (NO) (74) Representative: White, Duncan Rohan  Marks & Clerk LLP Fletcher House (2nd Floor) Heatley Road The Oxford Science Park Oxford OX4 4GE Oxford OX4 4GE (GB)